Combination denture press and vulcanizer



Feb. 2, 1932. w. M. POST COMBINATION DENTURE PRESS AND VULCANIZER 5 Sheets-Sheet 1 7 p l w 0 a v W 0 r By Wm A iiorney Fgb. 2, 1932. w. M. POST COMBINATION DENTURE PRESS AND VULCANIZER 3 Sheets-Sheet 5 Filed Oct. 17, 1929 zmfi oa'i' Attorney clamping action the line 3-3 looking tion of the arrow.

Patented Feb. 2, 1932 WILLIAM MI. POST, 0F HOOD RIVER, OREGON COMBINATION DEN TUBE PRESS AND VULOANIZER Application filed October 17, 1929. Serial No. 400,345.

This invention relates'to an improved dental'machine of the type generally known in the proess ion and trade as a combined denture press and vulcanizer.

riefly stated, the structure is characterized y a legsupported steam tight container having a removable cover, appropriategauge means and pressure release means.

The principal improvement is predicated upon a rerhovably internally arranged denture press which depends for its clamping action on a vertically liftable flask carrying cradle and cooperable details for insuring a positive and gradual compressing and on flasks.

The invention has reference to a type of press and vulcanizer which is especially, but not necessarily, adapted for vulcan i'zing and pressing artificial denture material.

The particular details of the apparatus will become more readily apparent from the following description and drawings.

In thedrawings:

Figure 1 is an 'elevational view of a machine constructed in accordance with the present invention.

Figure 2 is an enlarged central vert cal section through the same showing the internal construction.

, Figure 3 is a horizontal section taken on Figure 4 is a cross section on the line 4-4 looking downwardly.

igure 5 is a similar cross section on the line 55 through the cradle looking downwardly.

Figure 6 is a detail sectional view of one of the retainers constituting a part of the flask carrying cradle.

Referring now to the drawings in detall, and specifically to Figure 2, it will be observed that the reference character 7 designates the casing which is in the nature of a fluid tight container and provided with appropriate supporting legs 8. Carried by an annulus 9 at the top are outstanding ears 10 which carry pivotally mounted threaded ret ainers or fastening devices 11 which cooperate with spaced clamping lugs 12 on the upwardly in the direcd pressure relief cook 36, a

marginal portion of the removable cover 13. The cover has a central upstanding sleeve 14 provided on its upper end with a stuffing box 1 5. An operating stem threaded through the sleeve and down into the interior of the container.

on 1ts upper end with operating On the lower lar 18 carrying a ball race st reducing friction. The ball or shaft 16 is It is provided handles 17.

or inner end is a retaining colructure 19 for race engages with the top plate 20 of the internal cradle structure and the shaft 16 passes through a plain hole in the plate 20, said hole being of greater diameter than the diameter of the shaft. Thus'the plate is swivel ed to the shaft.

The top plate is connected with a base or bottom plate 21 by way of bolts 22, there being a series of four as seen in Figure '5.

The bottom of these bolts arranged plate is provided on oppositesides with outstanding apertured projections 24 receiving the lower reduced end portions of the pair of ing strips 25. The upper ends are also reduced as apertures in the outstanding formed on the bottom of a referred to as a bumper 28.

diametrically opposite retainof these strips at 26 and extend through projections 27 This bumper is provided with extension arms 29 having outstanding flanges 30 at their upper ends etacha bly engaged with keepers 31 formed on the underside of the cover 13, as seen plainly in for assuring-proper connection The bumper also includes a tion 33 at its bottom, and it that the top plate 20 is recta Figure 2. Set screws 32 are provided to the bumper. U-shaped porwill be noted ngular and of an area to telescope-into the bumper and to allow the flasks 34 and ing engagement with ber On the cover and an automatic blow-off val 35 to come into clampthe U-shaped memplate is a hand controlled pressure gauge 37 Place the flask in the cradle with teeth in lower side of flasks. of water to cover top flask more. Never fill pot full.

live (35) minutes to raise s pounds steam pressure. Turn Put suificient amount two inches or Allow thirtyeventeen (l7) shaft 16 backmended; Mix the plaster plaster to set .three minutes. The required time from twelve to fifteen minutes- Allow steam gauge to return to zero. Open relief valve and remove cradle. Allow 5 case to cool three hours. Do not release cradle until case has cooled. To release cradle return same to the pot 7 and set cover tight. Turn shaft downward to release flask. This will save time and trouble. Finish the 1 case with files and scrapers. Do not use emery cones as they heat the'plate distorting the same. v

When pressing only one case put flask in the bottom of the cradleand empty flask on 15 top. Cover .water. The case is'pressed when the top plate comes to a stop. Do not turn shaft after coming to the stopping point. Cut Oil surplus material from sides of the flasks to ward every three to press a case is 20 insure easy removal from the cradle.

Do notopen relief valve to reduce temperature. Allow same to cool before opening pot. After plate is finished treat with ammonia. One teaspoonful ammonia to one cupwater 25 infruit jar.

case'to' remain in jar overnight. Remove the cradle, close valvebelow safety valve. Four vulcanite cases may be vulcanized at one time by us1ng flask clamps. Place crosswise in thepot, raise the pressureto one hundred pounds in forty-five minutes and hold for fifty-five minutes. Allow steam gauge to return to zero before opening vulcanizer. Open petcock before removing cover,.to allow the airto escape. The pot should be cleaned after using. Finish case in the usual manner. I

For running up 111 good grade of flasking dels and investing cases plaster is recomthoroughly with the fingers so that dry spots and lumps will not occur. Be sure that the upper and lower parts of flask are in complete contact on edges before pouring upper partof'fl'ask. Allow hours or more before boiling out the wax. The pressing should be done at once. If allowed to stand the plaster will deteriorate causing misplacement of the teeth. Do not remove any plaster that has .run between flask sections. 'Out' waste gates as shown in flask. dercuts should be invested high in front part of flask. All undercuts in the part of flask containing the teeth should be cut away. 7 This will avoid folding out of the blank.

To regulate the cradle 'cover orlid. Place flask in position and lower flaskwithtwo inches of tion, operation,

Screw cover on tight and allow I a cylinder,

her having bottom plate one 'upp Plates with anterior. u'nnovelty is in the construction of the press which is characterizedby a vertically liftable "cradle, said cradle being such in construction and operation as to a structure of this class in a more satisfactory, dependable,

fulfill the requirements of and efficient manner. 'It 18 thought that persons skilled in the art to which the invention relates will be, ableto obtain a clear understanding of the construcand features and advantages the description and the accompanying drawings. Therefore a more lengthy description is regarded as unnecessary. r 7

Minor changes in shape,

after considering the field of invention claimed may be resorted to in actual practice if desired.

I claim:

A press a detachable cover for the cylina substantially U-shaped bumper memupwardly extending legs, means for detachablyconnectingthe upper ends of the legs to the under si plate shaped to passthrough the U-shaped member, a bottom plate, bolts connecting the plates together in spaced. relation, a pair of strips having their lowerv ends resting on the at each rated ears extending outwardly from the der,

bumper member and the strips having re .duced' upper ends sliding thru the perforations, a threaded stem passing through a threaded part. of the cover and swiveled to thei top plate whereby turning movement of the stem will move the holder which includes the er and lower plates. 7

In testimony whereof I afiix my'signature. WILLIAM M. POST.

Turn cradle against '7 tighten the four nuts until flask is held tight V to remain open until considerable live steam This w1ll insurecorrect regulabe 13101). Any anleft in vulcanizer causes inhas escaped.

size, and materials; 1. and rearrangements of details coming withm of the class described comprising".

de of the cover, a top:

side thereof, perfo 

